ANTI-RUST COATING & OUTSTANDING CRAFT:The copper alloy bike bell is made of high quality copper alloy with anti-rust and anti-aging coating, which offers a long-lasting using. Our bike bell with excellent craft shown exquisite appearance and small size: 2cm~2.5cm(0.8in~1 in). HARD COPPER HAMMER & UNEAQUALED LOUD SOUND:The hard copper hammer combine with internal collision sounding system, Classic Bike Bell brings us a clear, sweet, loud sound. Pedestrians and passing vehicles can clearly hear your ringtone, early warning for our security RETRO DESIGN："Fashions fade, style is eternal." Our bicycle bell’s retro design makes people feel like they are in the old days. The small and exquisite shape will makes you love it EASY INSTALLATION: Our copper alloy bike bell fits for bicycles from 22.2mm to 22.8mm handlebars or stems. We’ll send a hexagonal wrench to you for your fast and easily installation on the right or left handlebar as shown in the picture 3 AFTER SALE SERVICE: If there is any problem with the product, please don't hesitate to contact us.